CN2655389Y - Winding shielded double wire armoured cable - Google Patents

Abstract

The utility model belongs to a cable product in the electric apparatus art, which is mainly used for performance of well detecting, chip fetching and the like of each kind of oil gas well in an oil geography detecting, and can also be used for the ocean investigation, a river, a harbor, a water hydrology detecting, a mine coal geography detecting, a geothermal well detecting and the like. The cable product solves the deficit that the original cable is easy to be punched, is not easy to be separated, and has short life, wherein an inner layer steel wire (2) and an outer layer steel wire (1) are made on a winding barrier layer (6), above five copper winding wires (3) are equipped inside the winding barrier layer (6), the copper winding wires (3) are packaged with an insulation body (5), and semi conductive stuffing wires (4) are stuffed between wires. The utility model has the main advantages of guaranteeing each kind of data measuring correctness, convenient usage, prolonging the cable using life greatly, decreasing the happening of each kind of accident, and obvious economic effect increasing.

Description

The non-shielding double wire armor cable that extrudes

One, technical field:

The utility model belongs to the cable product of appliance field, be mainly used in various oil gas wells in the petroleum geology exploration well logging, get operations such as core, also can be used for oceanographic survey, river, bay, water conservancy hydrographic survey, coal geological exploration exploration, geothermal logging etc.

Two, technical background:

Current, aspect geological prospecting, especially the cable that the well logging industry is used in the petroleum geology exploration system is the cable of producing according to the standard of former national Machinery Ministry recommendation, total shielding of original cable employing or the electric field energy imbalance that single core phase-splitting extrudes, wrapped shielding solves cable.Undesirable because of total shielding properties, existing most the employing extrudes the split screen structure.But this type of cable causes cable insulation thickness to reduce because of increasing screen, frequent, stressed bigger because of using in the well logging process, the cable breakdown phenomenon appears easily, searching and change cable behind the cable breakdown needs for a long time, causes whole exploration system paralysis.Phase-splitting extrudes shield layer of shielded cable after the use of going into the well in addition, because of be subjected to for a long time the HTHP effect cause screen and insulating barrier extremely difficulty peel off, do not note slightly as operation, there have some screens to remove to be unclean, will cause cable short circuit, appearance accident or make cable termination again influences whole exploration progress.Therefore the unappeasable well logging industry of former logging cable is used, and presses for a kind of new cable that can use and satisfy the logging technique requirement for a long time.

Three, summary of the invention:

The purpose of this utility model provides the non-shielding double wire armor cable that extrudes, solve cable easily breakdown, be difficult for peeling off, defective that useful life is short.Because of operation under the specific environment of down-hole, the external diameter of cable, tensile strength, roundness etc. must be equal to former logging cable, can only redesign internal structure, increase thickness of insulating layer and it is easily peeled off, remove original screen that extrudes, the core insulation thickness is strengthened, the transformation of the way of core packing material is the interstitial wire of half lead-type, with the core of this interstitial wire stranding, single insulated wire cores enlarged in thickness, electric property is strengthened, stopped punch-through, core is different with interstitial wire polarity simultaneously, even at high temperature, can not bond under the high pressure yet, avoid the generation of operate miss.It is double armor that core adopts the carbon zinc-coated wire, has guaranteed tensile strength, the roundness of cable.

The beneficial effects of the utility model be ensured Various types of data measure accurate, easy to use, prolonged cable useful life greatly, reduced the generation of all kinds of accidents, increase economic efficiency obviously.

Four, description of drawings:

As figure is structural representation of the present utility model.

Among the figure 1, cover wire, 2, steel wire of internal layer, 3, the copper stranded conductor, 4, semiconductive type interstitial wire, 5, polypropylene or fluoroplastic insulation body, 6, lapped shielding layer,

Five, execution mode:

As seen from the figure, outside lapped shielding layer 6, be shaped on steel wire of internal layer 2 and cover wire 1, copper stranded conductor 3 more than five is installed in wrapped shielding 6, in copper stranded conductor 3 packings polypropylene or fluoroplastic insulation body 5 are arranged, fill the interstitial wire 4 of semiconductive type in the core gap, make its electric field shielding influence effectively.

Claims (1)

1, the non-shielding double wire armor cable that extrudes, it is characterized in that outside lapped shielding layer (6), being shaped on steel wire of internal layer (2) and cover wire (1), copper stranded conductor (3) more than five is installed in lapped shielding layer (6), copper stranded conductor (3) packing has insulator (5), fills semiconductive type interstitial wire (4) in the core gap.